ModSecurity Blog

We have just released ModSecurity 2.5.6 to address several issues with transformation caching: the subsystem is unstable, can crash your server server, and is even susceptible to evasion in certain circumstances. Although the issues have all been fixed in 2.5.6 we have decided to deprecate the entire subsystem because there has been too many problems with it. If you are using the 2.5.x branch of ModSecurity you are advised to turn transformation caching off (it is on by default until 2.5.6) until you upgrade. You can do this with: